Labomed eVO 500, User Manual

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4 Operating Procedure
1. Turn the power using the ON/OFF switch located on the front of the power supply.
Brightness can be adjusted by rotating the illumination level knob situated on the
microscope base.
NOTE: The maximum position is for intermittent use only. Continuous use will
shorten lamp life.
2. Insert the projection rod in the pivot post of the instrument body to make rough PD
and focus adjustments. Position the light onto the flat surface of the projection rod
and adjust the pupillary distance and focus of the eyepieces till a comfortable
viewing is obtained. Remove the projection rod.
3. To position a patient, adjust the chinrest height by turning the control knob on the
post of the chin rest assembly until the patient’s canthus is in line with the canthus
mark on the chin rest post.
4. Microscope elevation is adjusted by rotating the joystick and observing the Slit
image through the microscope until the slit is centered on the patient’s cornea.
5. Move the Slit lamp with the joystick held firmly and slightly angled towards the
patient, until the slit appears sharply on the cornea. The accuracy of this rough
adjustment should be checked by the naked eye. The fine adjustment is performed
while observing the slit through the microscope.
6. Tilt the joystick, which is now held lightly at its upper end, until the slit appears
sharply at the depth of the eye which is to be observed. The horizontal motion of
the base can be locked by tightening the base locking screw. Lock the base
whenever the slit lamp is not in use.
7. The slit width can be adjusted by rotating the slit width control knob on either sides
of the instrument.
8. The angle between the illumination system and the microscope can be varied
between 0° to 90° to either the left or to the right. The angle is indicated on the
scale of the slit lamp arm.